I don't think we'll have much trouble rolling a full house with 8 die every turn. I say go for the fours, which will buy us a little forgiveness in the top bracket if we get stuck looking for a specific category late in the game. (average for the bonus is 3 of each)

5-5-2-3-6-2-2-6. Crapola. Full House, two's, or three-of-a-kind? Let's see...def not 3oaK, as the total sucks. With two's I'm still on par for the Upper Half bonus, sort of a default play. Full House, as someone mentioned, is pretty easy to get in this game, but why waste it here. I'm thinkin' two's. Not gaining much, but not foregoing much.